Improved machine fob mazing keys foe bolts



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NN ATH AN ADAMS, or ALTo'oN A, PENNSYLVANIA.

Letters Patint No. 69,740, dated octobeles?.

IMrRovED MAeHINE ron MAKING Kers POR BoLTs.

r @te tlgehule nient tu. iu that rttrtt ntcnt mit mating pnt at the sinn.

'ro ALLTWHoM rr MAY ooNennN: p

lBe it known that NATHAN' ADAMS, 4of Altoona, iu the county of Blair, and State of' Pennsylvania, have Hintvented a new and improved Machine forMaking Keys .for Bolts; and I do hereby declare that the following is afu'll, clear, and exact description thereof, whielrwill'cnable others skillcdin the art Vto make and u'se the same, reference being had to the accompanying drawings, forming 'part'of this specification, in which- Figure 1 is a -plan or top view of my invention. i

Figure 2 is a. similar view, partly in section. i

Figure 3 is a vertical sectional v'ew ofthe same, the plane-oi' sectio'n being indicatedl by the lineas: z, fig. l.

vFigure 4 is a vertical sectional view of the same, taken on the line y y, iig. 1f

Similar lettersof reference indicate like parts. Y

This invention relatesA to a machine-for making split or spring-keys for securing bolts.

.The invention consists in the use of dies and levers, whereby the-bar from which the key is to lbe made is cut, brent into the required shape, and then dropped; the whole operation requiring but two moves of a lever. The'whole machine being very small and compact, does not require much power to operate it.

A isa circular plate, made of` metal er any other suitable material. To the underside ofA this plate are secured two lug-s a a, whereby the machine may be secured in a common vise. To the upper surface of the plate A are pivoted the dies B andC, their pivoting points b being in one of the corners in each ldie, so that,

by turning the dies on the same, either the edges@ or cl ofthe dies may touch each other. By 4means of arms e e the `dielsIare secured te a. bar, D, which is pivoted to the plat-eI A atf, and is, bymean s of a slotted rod, E, connected with the main lever F, so as to turn on its pivotfas soon as the lever turns on its pivot g.

Before inserting the bar' from which the key is to be made the machine is in"the position shown in fig. 1 that is,theifaces c c of the dies touching each other, the faces vl d forming the straight line. The bar is then inserted, as indicated by red lines invfg. 1, being passed along the line (lfd until it strikes the gauge h, which is securely fastened to the' plate A; A p in, z', is suspended from a. spring, K, by which it is pressed down, until a shoulder, Vl, ou it4 (figs. 31and4) comes in contact with a stationary bridge, 'G, which is. securely fixed to the plate A. Thispin is Varranged exactly above a slot, m, in theplate A, and when the dies are closed, as in Eg. 2, they t around the pin, being provided with semicircular recesses for the purpose. The metal bar,- when passed into the machine, as in tig. 1, lies between the edges cl d of thedies and the pin Vi. The lever Fis now moved inthe direction of the arrow in iig. 1', and presses, by means of a. cam, n, near its pivotingpoint, against the outer corner of *the die B.V The slot in the connectingrod E prevents the lever from acting on the same until the pin o strikes the lower end of the slot. By the pressure of the c'am n the bar is pressed against a cutter, H, which is secured to plate A, andthe length ofbar necessaryA for one-key is thus cut. The motion of the lever F scontiuued in the same'direetion, and thereby the dies B and C are folded together into the, positions shown in iig. 2, bending, by this movement, the bar around the pin vz', and pressing'its ends together, as shown by red lines in fig. .2. The lever F is new movedback again into the position shown in fig. 1, Aand the pressure -of the dies on the newly-formed key ceasing, the latter drops through the slot m in the plate A into a suitable receptacle. But'in caseit'might still adhere to the pin t', it is necessary to raise the said pin, to disengage the key from it. This isidene by' means of a cam, r, which is pivoted vto the extreme end of the spring K,`(see g. 4,)'in such a manner that its lower-'end is'below the upper surface ofthe bar D. By a shoulder, s,

our, the latter is prevented from beingturned back as it comes in contact with tbc bar D, during the backward movement of the lever F, and so, as the lever F and `bar D move inthe direction opposite to that which is indicated by the arrow in fig. 1.,.the latter bar comes in contact with the' curved-lower surface of the cam S,'and raises thesame, as it=cannot turn it back. Thereby the spring K, and consequently also the pin i, are raised, the latter sufficiently tobe completely disengaged from the key. During the forward movement of the lever F the bar D passes under the vcam r without raising the same, turning' it forward until it has passed below far enought-o enable the cam t' to drop, by its own gravity, into the position shown in iig. 4, when'it can be acted upon again during the backward stroke of the bar D.

lThus, it is'seen, that to operate this machine, it is onlynece'ssary to move the lever back and forth,'and to feed the bar. The latter will then be cut and formed inte the required shape, und dropped from the machine, without requiring any more ettention 'from the operator.

What claim as new, and desire to secure by Letters Patent, is-

l` The device for cutting:r the bm', consisting of the cem n on the lever F, die B, und cutter II, nil made und operating substantially as herein shown and described.

2. The combination of the gauge 7L with the cutter H, die B, end cam n on icver F, substantially :1S set forth.

3 The spring K, provided with the pine' and enm y, in combination with the bnr lD, substantiuiiy :is described, for the purpose specified.

4., The construction und arrangement of the slotted piste A, piveted dies B C, arms e c, pivoted bnr D, slotted rod E, lever F, having cam n, cutter H, stationary bridge G, gnuge i, spring K, hnvinfwT cnm y and pin z', all operating :is described, for the purpose specie i.

.NATHAN ADA MS.

Witnesses:

Perm N. MAnKs, A. CLABAUGH. 

